Can your rig run Crysis? If the answer's yes then you might want to check out its stand alone expansion, which is just as much fun, a little bit more explosive, and looks outstanding. The AI is arguably better, which makes the single player a little bit more challenging, and when you're done with that you can jump into the multiplayer, which has a load of different modes and maps. You can get hold of the game for £3.85, which'll save you over £3 on the next best offer coming in from Cool Shop UK.